No this is not possible, but seeing as you're not using it you can always use FIM workflow to derive a value for you. I use this approach myself when I need to enforce a unique display name on a FIM resource that has multi-part keys ... in my
case I had an entitlement resource type which was unique for every userID/startDate/endDate combination. I used a set transition (in) MPR on the "all entitlements with no display name" set (i.e. /Person[not(starts-with(DisplayName,'%'))] to fire a workflow
which used the FIM Function Evaluator activity to construct DisplayName by concatenating other properties on that entitlement object. You can use the same approach. You don't have to use a set-transition MPR either - and in fact you may need to
recalculate your DisplayName property when any of the contributing values change.
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